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Estimation methods for grow index as well as total nitrogen and fiber contents in tealeaves based on spectral reflectance and Bi-directional Reflectance Distribution Function: BRDF measurements with ground based network cameras is proposed. Also tea estate monitoring system with network cameras is proposed. Due to a fact that Near Infrared: NIR camera data shows a good correlation to total nitrogen while that shows negative correlation to fiber contents, it is possible to estimate nitrogen and fiber contents in tealeaves with NIR camera data. Through a comparison between actual direct measured and the estimated total nitrogen and fiber contents shows a good correlation so that a validity of the proposed method is confirmed. Also it is found that monitoring of a grow index of tealeaves with BRDF measured with networks cameras is capable. Thus it is concluded that a monitoring of tea estates is capable with network cameras of visible and NIR.